I’m working with Odoo 17 and need to customize the sales dashboard. I understand that the dashboard is defined in JSON format, which makes it a bit different from regular XML view customizations.

Specifically, I want to hide the “Top Medium” and “Top Source” sections from the sales dashboard.

Here’s what I’m looking for:

1. How can I override the existing JSON-based dashboard configuration in Odoo 17?
2. What is the best approach to hide specific sections like “Top Medium” and “Top Source” from the dashboard view?
3. Are there any examples or code snippets that illustrate how to customize or override a JSON-based dashboard configuration?